[Science Form 3] Functions of the heart

• Blood flows in a circulatory manner.
  
  
• The heart pumps blood out through contraction and squeezing action.
  
  
  • Blood is pumped out of the lungs to the heart through the pulmonary veins (oxygenated blood).
    
    
  • Blood is pumped out to other body parts through the aorta.
    
    
  • Arteries --> capillaries [ (dissolve oxygen + digested food + minerals --> cell)
    (waste products and carbon dioxide --> blood) ] --> veins.
    
    
  • Veins carry deoxygenated blood back to the heart (right side).
    
    
  • The deoxygenated blood is carried to the lungs to be oxygenated.